264 INSECTA. 
T. bovinus, L.; De Geer, Insect., VI, xii, 10, 11. An inch 
long; body brown above, grey beneath; eyes green; tibiz yel- 
low; transverse lines and triangular spots of pale yellow on the 
abdomen; wings transparent, with russet-brown nervures. 
The larva lives in the ground. It is elongated, cylindrical, 
and attenuated towards the head, which is armed with two 
hooks. The annuli of the body (twelve) are marked with raised 
cords. The nymph is naked, almost cylindrical, with two tu- 
bercles on the front, cilia on the margin of the annuli, and six 
points at the posterior extremity. Itascends to the surface of 
the soil when about to divest itself of its skin, in order to as- 
sume the form of a Tabanus, and protrudes the half of its body 
above it. Very common near Paris. 
T. maroccanus, Fab. Black, with golden-yellow spots on the 
abdomen.—The scourge of Camels, which, according to M. 
Desfontaines, are sometimes completely covered with these In- 
sects(1). 
Sometimes the antenne are very evidently longer than the head 
and terminated by a joint forming an elongated cone, or almost 
cylindrical, frequently presenting but four rings. The ocelli are 
wanting in several. 
Some, in which the last joint of the antennz is always subulate 
and divided into five rings, have three ocelli. 
Those, in which the first joint is manifestly longer than the follow- 
ing one, and cylindrical; and where the latter is very short, and re- 
sembles a cup, form the subgenus 
Sytvius, Meig. (2) 
Those, in which the two first joints are cylindrical, and almost 
equal in size, compose the subgenus. 
tween the preceding genus and Tabanus, according to our method, belong to the 
family of the Notacanthi. 
(1) For the remaining species of this subgenus, see Lat., Fab., Meig., Palis 
de Beauv., Macq., Fallen and Wiedemann. 
(2) See Meigen. He quotes but a single species, the Tubanus vituli, Fab., and 
to which he refers his T° italicus. 
